package websocket.socket_;

import com.alibaba.fastjson.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import websocket.entity.WrjPos;
import websocket.enum_.MsgType;
import websocket.service.WrjPosService;
import websocket.util.DateUtil;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.Objects;
import java.util.concurrent.CopyOnWriteArraySet;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * @author: NieRuiJie
 * @date: 2021年12月6日16:45:26
 */
@ServerEndpoint("/wrj/webSocket/{sid}")
@Component
public class WebSocketServer {

    public static WrjPosService wrjPosService;

    private static final Logger log = LoggerFactory.getLogger(WebSocketServer.class);

    /**
     * 实时连接数量
     */
    private static AtomicInteger onlineCount = new AtomicInteger(0);

    /**
     * concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
     */
    private static CopyOnWriteArraySet<WebSocketServer> webSocketSet = new CopyOnWriteArraySet<WebSocketServer>();

    /**
     * 与某个客户端的连接会话，需要通过它来给客户端发送数据
     */
    private Session session;

    /**
     * 接收sid
     */
    private String sid = "";

    /**
     * 连接建立成功调用的方法
     */
    @OnOpen
    public void onOpen(Session session, @PathParam("sid") String sid) {
        this.session = session;
        //如果存在就先删除一个，防止重复推送消息
        for (WebSocketServer webSocket : webSocketSet) {
            if (webSocket.sid.equals(sid)) {
                webSocketSet.remove(webSocket);
            }
        }
        webSocketSet.add(this);
        this.sid = sid;
        addOnlineCount();
    }

    /**
     * 连接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        webSocketSet.remove(this);
        //在线数减1
        subOnlineCount();
    }

    /**
     * 收到客户端消息后调用的方法
     *
     * @param message 客户端发送过来的消息
     */
    @OnMessage
    public void onMessage(String message, Session session) {
        log.info("收到来自" + sid + "的信息:" + message);
        //群发消息
        for (WebSocketServer item : webSocketSet) {
            try {
                item.sendMessage(message);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    @OnError
    public void onError(Session session, Throwable error) {
        log.error("发生错误");
        error.printStackTrace();
    }

    /**
     * 实现服务器主动推送
     */
    private void sendMessage(String message) throws IOException {
        this.session.getBasicRemote().sendText(message);
    }


    /**
     * 群发自定义消息
     */
    public static void sendInfo(SocketMsg socketMsg, @PathParam("sid") String sid) throws IOException {
        String message = JSONObject.toJSONString(socketMsg);
        //log.info("socket推送消息到【" + sid + "】，推送内容:" + message);
        // 存储无人机经纬度
        if(socketMsg.getMsgType().equals(MsgType.ZUI_JIA_WEI_ZHI)){
            JSONObject json = JSONObject.parseObject(socketMsg.getMsg());
            double lon = json.getDouble("lon"); // 经度
            double lat = json.getDouble("lat"); // 纬度
            WrjPos pos = new WrjPos();
            pos.setLat(lat);
            pos.setLon(lon);
            pos.setCreatTime(DateUtil.getCurrentTime());
            wrjPosService.save(pos);
        }
        for (WebSocketServer item : webSocketSet) {
            try {
                //这里可以设定只推送给这个sid的，为null则全部推送
                if (sid == null) {
                    item.sendMessage(message);
                } else if (item.sid.equals(sid)) {
                    item.sendMessage(message);
                }
            } catch (IOException ignored) {
            }
        }
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        WebSocketServer that = (WebSocketServer) o;
        return Objects.equals(session, that.session) &&
                Objects.equals(sid, that.sid);
    }

    @Override
    public int hashCode() {
        return Objects.hash(session, sid);
    }

    /**
     * 获取当前在线用户数
     */
    public static int getOnlineCount() {
        return onlineCount.get();
    }

    /**
     * 在线用户数加1
     */
    public static void addOnlineCount() {
        onlineCount.incrementAndGet();
        log.info("ws打开！当前在线用户数为" + getOnlineCount());
    }

    /**
     * 在线用户数减1
     */
    public static void subOnlineCount() {
        onlineCount.decrementAndGet();
        log.info("ws关闭！当前在线用户数为" + getOnlineCount());
    }
}
